• Phytophthora blight

  leaf wetness is required. Dispersal is by wind and rain causes the pathogen to be returned to the soil from infected plants. Dispersal in the soil happens [...] fungal growth on the leaves. The centre is grey-brown with a light-green edge. On the stem, elongated brown lesions occur, usually circling the stem. On potato [...] higher water content than is optimal for crop growth. Phytophthora overwinters in roots, infected tubers and bulbs or in the soil in different stages: as oospores

• Macro-Mite

  of action The predatory mites feed on larvae of sciarid flies , thrips pupae and other soil-dwelling insects. The mites appear in and on the soil and at [...] always be adjusted to the particular situation. Start introduction preventatively or as soon as the first pests are detected in the crop. Introduction rates [...] results the medium has to be moist, rich in organic matter and have a loose structure. The minimum temperature for successful use of Macro-Mite is 15°C (59°F)

• Chrysopa-E

  find. Chrysoperla carnea larvae are active mainly during the night. The larvae hide during the day. Pack size 100,000 eggs. Presentation 90 ml cardboard tube [...] after receipt. If necessary, the product can be stored for 1-2 days. Storage temperature 8-10°C/47-50°F. Storage conditions In the dark. Recommended for you [...] Koppert products for advice on the best strategy for your situation. Environmental conditions Chrysoperla carnea is effective in a wide temperature range including

• Modified formulation for Macro-Mite

  December 18, 2018

  boosts the vitality of the predatory mite. As product manager Tim Bossinga explains, 'the improved vitality is a result of the fact that the predatory [...] predatory mite can behave in a more natural way in the new carrier material. Upon delivery of the product, it remains important to apply the product as soon as [...] has developed a new formulation for Macro-Mite , which boosts the vitality of the Macrocheles robustulus predatory mite. Macro-Mite is an effective natural

• Apple rosy aphid

  General The rosy apple aphid, Dysaphis plantaginea , is a serious apple pest. It is widespread in Europe and also occurs in Africa, North and South America [...] trees. The eggs hatch in spring and at first the aphids attack buds, spur leaves and rosette leaves. Later the infestation spreads to young shoots. In spring [...] cauda is dark, short and triangular. Dysaphis plantaginea lays eggs in autumn in bark crevices on spurs and smaller branches, and on the base of buds of apple

• Ervipar

  mummy. The adult parasitic wasp emerges through a hole at the rear of the mummy. The first mummies are noticed in the crop around 10-14 days after the first [...] Buckwheat hulls. Application Spread the material on rock wool slabs or in Diboxes Make sure the material remains dry and is not moved from its introduction [...] after receipt. If necessary, the product can be stored for 1-2 days. Storage temperature 8-10°C/47-50°F. Storage conditions In the dark. Recommended for you

• Amblyseius swirskii

  also feed on pollen, which is useful for instance in sweet pepper crops as the predatory mite can establish in the crop before the pest appears. Amblyseius [...] Eggs are laid on the underside of leaves, often in the axil of veins. They are oval, white and are approximately 0.14 mm in diameter. The larvae have six [...] are the same colour as the eggs, and are only slightly larger. The larvae of Amblyseius swirskii do not need to feed. The nymphs are larger than the larvae

• Cutworms

  and hide in the ground during the day. Damage from these instars is usually observed as a cutting of young seedlings, often causing death of the cut seedlings [...] will occasionally tunnel into the growing stalk, disrupting the sap flow in the plant. Life cycle and appearance of Cutworms The adults of Agrotis spp. have [...] a broad dark marginal stripe. The wingspan is about 40-55 mm and the dorsal thorax is covered with close-lying hairs. The eggs are white at first but rapidly

• Verticillium wilt

  produces gum in the vessels. The presence of both the fungus and the gum causes the xylem vessels to get blocked, which in turn causes the plant to wilt [...] ed to new hosts. In the senescent tissue, the resting mycelium or the microsclerotia are formed. The spread of the fungus by mycelium growth is limited [...] cause wilting of plants. The wilting starts at the lower leaves. These leaves are pale-green, then orange-yellow. In the beginning the plant seems to recover

• Tomato russet mite

  time in Australia and is a pest in tomatoes in all areas where they are grown. Other members of the plant family Solanaceae may be affected to a lesser [...] and affected leaves dry out quickly. The damage is first seen on the lower part of the plant and moves upwards as the mites ascend. Life cycle and appearance [...] symptoms Damage is caused by the mites sucking out the contents of plant cells. Affected leaves are slightly curled and acquire a silvery sheen on the underside